This is a free and open-source 3D CAD platform that allows online modeling without downloading or installation. It is written in TypeScript and combines WASM and Three.js technologies to provide a smooth 3D visualization experience. It supports creating basic shapes (such as cubes, cylinders, cones, etc.), 2D sketching (lines, arcs, circles, etc.), and advanced operations (Boolean operations, extrusions, rotations, chamfers, etc.).